Michigan coach John Beilein says he'd still like to employ a two-post offense from time to time, but not for an entire game. Melanie Maxwell | AnnArbor.com

MADISON, Wisc. -- Michigan basketball coach John Beilein knows he can get more from his interior defense and offense.

But he's not ready to supersize his lineup just for the sake of doing so.

"I think we're trying to get Glenn opportunities where he could play (small forward instead of power forward)," Beilein said. "But when we go bigger, we're trying to get him rest. Not necessarily (just to go big).

"Who do you take out? Tim (Hardaway Jr.) or Nik (Stauskas)? And I like what Caris (LeVert) has brought to us, too. That's the dilemma. Who do you take out?"

Beilein's top four players are guards and wings -- Trey Burke, Hardaway, Robinson and Stauskas.

That said, it would only make sense for those four players to see heavy minutes night in and night out. And, in order to do that, Michigan almost has to player smaller.

Beilein still maintains that he'd like to employ a two-post lineup with a two-man combination of Mitch McGary, Jon Horford or Jordan Morgan -- who is still recovering from an ankle injury -- on the floor at the same time, but maybe for 10 to 15 minutes per game.

In that scenario, Beilein says he'd like to play Morgan at power forward, and allow McGary or Horford (who are both 6-foot-10) to play center. That would then slide Robinson down to the three and put Stauskas on the bench, or vice versa.

Which isn't always ideal.

"I think that's our strength, (point guard through small forward) right now is a tremendous strength of this team," Beilein said. "And that four-man, Glenn has played great there all year long -- you can't ask for more. Especially from a freshman."

Michigan still has to play Michigan State twice and Indiana another time, two teams that feature a great deal of size and length inside.

The Wolverines still hold a +6.6 rebounding margin this season, which is fourth-best in the Big Ten. Michigan also allows opponents just 29.6 boards per game, which is No. 1 in the conference -- which is partly skewed because the Wolverines still lead the nation in offensive efficiency.

For the first time in his career, Beilein has the luxury and option of playing two big men at the same time. And against teams like Michigan State and Indiana, he says it's an option.

But every other night?

His team's 21-2 -- something's working. So why tweak things just for the sake of doing so?

"We have other options," Beilein says. "We can play smaller, we can play bigger."